Control device and control method of air conditioner, equipment and storage medium

Abstract

The invention discloses a control device and method of an air conditioner, equipment and a storage medium. The control device comprises a controller, a power circuit and an energy storage circuit, and the controller is used for controlling at least one valve body to act and supplying power to the at least one valve body; the energy storage circuit is used for supplying power to the controller, storing electric energy output by the power supply circuit when the power supply circuit supplies power to the energy storage circuit, and performing filtering and voltage stabilizing processing on an output power supply of the power supply circuit; the output end of the energy storage circuit is connected with the power supply end of the controller; the power supply circuit is used for converting an external power supply and then supplying power to the energy storage circuit; the output end of the power circuit is connected with the power end of the energy storage circuit. Under the condition that the external power supply is suddenly powered off, the energy storage circuit supplies the stored electric energy to the controller, the valve body can be controlled to be completely closed, and the safety and reliability of the air conditioner are improved.

Description

Technical Field

[0001] This application relates to the field of air conditioners, and particularly to a control device for an air conditioner, its control method, equipment, and storage medium. Background Art

[0002] An electric valve is usually used in an air conditioner. By sending a pulse signal or turning the power supply on and off, the opening degree of the electric valve, the truncation and opening of the flow path are controlled. Before the air conditioner stops running, the electric valve will be controlled to be in a set state.

[0003] In the related art, when the external power supply of the air conditioner suddenly cuts off, the controller of the air conditioner no longer controls the electric valve, and the electric valve maintains the opening state before power-off until the next power-on. If there is a leak in the indoor unit of the air conditioner, since the electric valve maintains the current opening state, the refrigerant in the refrigerant pipeline will leak into the surrounding environment of the air conditioner through the electric valve, and some types of refrigerants are flammable, posing a safety hazard. Summary of the Invention

[0004] In view of this, the embodiments of this application provide a control device for an air conditioner, its control method, equipment, and storage medium, aiming to control the valve body to be in a fully closed state when the external power supply of the air conditioner suddenly cuts off, improving the safety and reliability of the air conditioner.

[0005] The technical solution of the embodiments of this application is implemented as follows:

[0006] In a first aspect, the embodiments of this application provide a control device for an air conditioner. At least one valve body is arranged on the refrigerant pipeline of the air conditioner, including:

[0007] A controller, configured to control the at least one valve body to act and supply power to the at least one valve body;

[0008] An energy storage circuit, configured to supply power to the controller; the output end of the energy storage circuit is connected to the power supply end of the controller;

[0009] A power supply circuit, configured to convert and process the external power supply and supply power to the energy storage circuit; the output end of the power supply circuit is connected to the power supply end of the energy storage circuit;

[0010] Wherein, when the power supply circuit supplies power to the energy storage circuit, the energy storage circuit is configured to store the electric energy output by the power supply circuit and perform filtering and voltage stabilization processing on the output power of the power supply circuit.

[0011] In some embodiments, the energy storage circuit includes:

[0012] An energy storage unit, configured to store the electric energy output by the power supply circuit and supply power to the controller when the power supply circuit is powered off;

[0013] A buck circuit is used to step down the output voltage of the power supply circuit and then charge the energy storage unit and supply power to the controller.

[0014] In some embodiments, the energy storage circuit further includes:

[0015] A first voltage detection circuit is used to detect the output voltage of the buck circuit, obtain a first voltage value, compare the first voltage value with a first set voltage threshold, and send a first comparison result to the buck circuit. The buck circuit controls the charging mode of the energy storage unit based on the first comparison result;

[0016] Wherein, the charging mode includes: a constant current charging mode and a trickle charging mode.

[0017] In some embodiments, the control device further includes:

[0018] A second voltage detection circuit is used to detect the power supply state of the external power supply, generate first power detection information indicating that the external power supply is supplying power normally, and send the first power detection information to the controller.

[0019] In some embodiments, the energy storage unit is further configured to supply power to the controller within a first set duration when the power supply circuit is powered off;

[0020] Wherein, the first set duration is greater than or equal to the duration required for the controller to control the at least one valve body to change from the fully open state to the fully closed state.

[0021] In some embodiments, the energy storage unit is configured such that when the power supply circuit is powered off, the output voltage value of the energy storage unit is greater than or equal to a second set voltage threshold within a first set duration;

[0022] Wherein, the second set voltage threshold is the lower limit value of the operating voltage allowed by the controller.

[0023] In some embodiments, the energy storage circuit and the controller are provided on the same substrate.

[0024] In some embodiments, the control device is provided on the main control board of the outdoor unit of the air conditioner.

[0025] In some embodiments, the energy storage unit includes: an electrolytic capacitor.

[0026] In a second aspect, an embodiment of the present application provides a control method for a control device of an air conditioner as described in the first aspect of the embodiments of the present application. The method includes:

[0027] Determine that the power supply circuit is powered off;

[0028] Control the at least one valve body to close to a fully closed state.

[0029] In some embodiments, the method further includes:

[0030] After controlling the at least one valve body to close for a first set duration, the controller shuts down and cuts off the power supply;

[0031] Wherein, the first set duration is greater than or equal to the duration required for the controller to control the at least one valve body to move from a fully open state to a fully closed state.

[0032] In some embodiments, the determining that the power supply circuit is powered off includes:

[0033] If no first power detection information is received within a second set duration, it is determined that the power supply circuit is powered off;

[0034] Wherein, the first power detection information is generated by a second voltage detection circuit of the control device and is used to characterize that the external power supply is supplying power normally.

[0035] In some embodiments, the method further includes: if the first power detection information is received within the second set duration, it is determined that the external power supply is supplying power normally;

[0036] Control the at least one valve body to reset and be in a set state;

[0037] Wherein, the first power detection information is generated by a second voltage detection circuit of the control device and is used to characterize that the external power supply is supplying power normally.

[0038] In a third aspect, an embodiment of the present application provides a control device for an air conditioner according to one aspect of the embodiments of the present application, and the controller is configured to execute the steps of the method according to the second aspect of the embodiments of the present application.

[0039] In a fourth aspect, an embodiment of the present application provides an electronic device, the electronic device is an air conditioner, including: at least one valve body and a control device as described in the third aspect.

[0040] In a fifth aspect, an embodiment of the present application provides a storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the method according to the second aspect of the embodiments of the present application are implemented.

[0041] The control device of the air conditioner provided by the embodiment of the present application includes: a controller for controlling the at least one valve body to actuate and supplying power to the at least one valve body; an energy storage circuit for supplying power to the controller, the output end of the energy storage circuit is connected to the power supply end of the controller; a power supply circuit for converting and processing the external power supply and supplying power to the energy storage circuit, the output end of the power supply circuit is connected to the power supply end of the energy storage circuit; when the power supply circuit supplies power to the energy storage circuit, the energy storage circuit is used to store the electric energy output by the power supply circuit and perform filtering and voltage stabilization processing on the output power supply of the power supply circuit. Based on the arrangement of the energy storage circuit between the power supply circuit and the controller, in the case of a sudden power failure of the external power supply, the energy storage circuit can supply the stored electric energy to the controller, and then can control the valve body to be completely closed, effectively avoiding the leakage of combustible refrigerant through the leakage point to the surrounding environment where the air conditioner is located, and improving the safety and reliability of the air conditioner; the energy storage circuit and the controller are connected in series, the energy storage circuit can be used as a voltage stabilization circuit at the front end of the power supply end of the controller, and there is no need to set a voltage transformation circuit between the energy storage unit and the controller. Based on the miniaturization design scheme of the energy storage circuit, the energy storage circuit and the controller are arranged on the same substrate, saving the cost of the control device. Description of the Drawings

[0042] Figure 1 It is a schematic structural diagram of the control device of the air conditioner according to the embodiment of the present application;

[0043] Figure 2 It is a schematic structural diagram of the energy storage circuit according to the embodiment of the present application;

[0044] Figure 3 It is a schematic structural diagram of the energy storage circuit in an application example of the present application;

[0045] Figure 4 It is a schematic structural diagram of the control device of the air conditioner in an application example of the present application;

[0046] Figure 5 It is a schematic structural diagram of the control device of the air conditioner in another application example of the present application;

[0047] Figure 6 It is a schematic flowchart of the control method of the control device according to the embodiment of the present application;

[0048] Figure 7 It is a schematic diagram of the second voltage detection circuit in an application example of the present application;

[0049] Figure 8 It is a waveform schematic diagram of the first power supply detection information in an application example of the present application;

[0050] Figure 9 It is a schematic structural diagram of the air conditioner in another application example of the present application;

[0051] Figure 10Schematic flow chart of the normal power-on control method of the control device in an application example of this application;

[0052] Figure 11 Schematic flow chart of the control method of the control device when the external power supply suddenly cuts off in an application example of this application. Detailed implementation manners

[0053] The following further describes this application in detail with reference to the accompanying drawings and embodiments.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the specification of this application herein are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0055] An embodiment of this application provides a control device for an air conditioner. As Figure 1 shown, at least one valve body 400 is provided on the refrigerant pipeline of the air conditioner. The control device includes: a controller 100, an energy storage circuit 200, and a power supply circuit 300. The controller 100 is used to control the action of at least one valve body 400 and supply power to at least one valve body 400. The energy storage circuit 200 is used to supply power to the controller 100. The output end of the energy storage circuit 200 is connected to the power supply end of the controller 100. The power supply circuit 300 is used to convert and process the external power supply 500 and supply power to the energy storage circuit 200. The output end of the power supply circuit 300 is connected to the power supply end of the energy storage circuit 200. Among them, when the power supply circuit 300 supplies power to the energy storage circuit 200, the energy storage circuit 200 is used to store the electric energy output by the power supply circuit 300 and perform filtering and voltage stabilization processing on the output power supply of the power supply circuit 300.

[0056] Here, the refrigerant is used to transfer heat energy in the air conditioner to produce a cooling or heating effect. The refrigerant pipeline is connected to the indoor unit and the outdoor unit of the air conditioner for the circulation of the refrigerant. The valve body 400 controls the refrigerant flow in the refrigerant pipeline by adjusting the opening degree to produce different cooling or heating effects.

[0057] Among them, the valve body 400 can be an electric valve. The embodiment of this application does not specifically limit the type of the valve body 400. The air conditioner includes at least one valve body 400, and the number of valve bodies 400 can be determined according to the number of refrigerant pipelines.

[0058] It should be noted that when the controller 100 of the air conditioner receives an external shutdown instruction, the controller 100 will sequentially shut down the various working components of the air conditioner according to the set shutdown steps. After all the shutdown steps are completed, the controller 100 executes a power-off step. At this time, the air conditioner loses the control power supply and is in a shutdown and power-off state.

[0059] Among them, the set shutdown steps include the controller 100 controlling the valve body 400 to be in a set state.

[0060] It should be noted that in the related art, when the external power supply of the air conditioner suddenly cuts off, the controller loses the input power supply and cannot execute the shutdown steps before the power failure. The controller no longer controls the opening degree of the valve body, and the valve body remains in the opening state before the power failure until the next power-on. For example, if there is a leak in the indoor unit of the air conditioner, since the valve body maintains the current opening state, the refrigerant in the refrigerant pipeline will leak through the leak point and the valve body into the surrounding environment where the air conditioner is located, posing a safety hazard; when the refrigerant is flammable, an explosion may even occur.

[0061] It can be understood that in the embodiment of the present application, an energy storage circuit 200 is provided between the power supply circuit 300 and the controller 100. In the case of a sudden power failure of the external power supply 500, the energy storage circuit 200 can supply the stored electric energy to the controller 100, and the controller 100 controls the valve body 400 to be completely closed, effectively avoiding the leakage of flammable refrigerant through the leak point and the valve body 400 into the surrounding environment where the air conditioner is located when there is a leak in the indoor unit of the air conditioner, improving the safety and reliability of the air conditioner.

[0062] In an application example, the power supply circuit 300 may include a rectifier circuit, a filter circuit, and a switching power supply circuit. The rectifier circuit is used to rectify the alternating current output by the external power supply 500 into direct current; the filter circuit is used to eliminate the high-order harmonics in the direct current output by the rectifier circuit; the switching power supply circuit is used to adjust the voltage of the direct current output by the filter circuit and supply it to the energy storage circuit 200.

[0063] Exemplarily, as Figure 2 shown, the energy storage circuit 200 includes: an energy storage unit 201 and a buck circuit 202. The energy storage unit 201 is used to store the electric energy output by the power supply circuit 300 and supply it to the controller 100 when the power supply circuit 300 is powered off; the buck circuit 202 is used to step down the output voltage of the power supply circuit 300 and charge the energy storage unit 201 and supply it to the controller 100.

[0064] It can be understood that the output voltage of the power supply circuit 300 needs to be stepped down to the charging voltage by the buck circuit 202 before charging the energy storage unit 201 and supplying it to the controller 100. Therefore, the output voltage of the power supply circuit 300 is greater than the rated working voltage of the controller 100; after the power supply circuit 300 is powered off, the energy storage unit 201 can directly supply power to the controller 100. Therefore, the nominal voltage of the energy storage unit 201 is within the allowable working voltage range of the controller 100.

[0065] Here, the rated working voltage and the allowable working voltage range of the controller 100 can be obtained from the technical specification manual provided by the manufacturer of the controller 100.

[0066] It should be noted that, as an energy storage element, the output voltage of the energy storage unit 201 is stable compared with the power supply circuit 300, and it can directly supply power to the controller 100; when the output of the power supply circuit 300 is normal, the energy storage unit 201 can play a role in filtering and voltage regulation.

[0067] It should be noted that the withstand voltage level of the buck circuit 202 is higher than that of the controller 100. After the output voltage of the power supply circuit 300 is stepped down by the buck circuit 202 and supplied to the controller 100, it can effectively reduce the impact of the output voltage fluctuation of the power supply circuit 300 on the controller 100, and the buck circuit 202 plays a role in filtering and voltage regulation.

[0068] It can be understood that the energy storage unit 201 directly supplies power to the controller 100, and there is no need to set a voltage conversion circuit between the energy storage unit 201 and the controller 100, which reduces the volume of the energy storage circuit 200.

[0069] Exemplarily, the energy storage unit 201 includes: electrolytic capacitors.

[0070] Here, the positive electrode of the electrolytic capacitor is a metal foil, and the main component of the negative electrode is an electrolyte. The electrolytic capacitor has a large capacitance per unit volume and can meet the demand for supplying power to the controller 100.

[0071] Exemplarily, as Figure 3 shown, the energy storage circuit 200 further includes:

[0072] A first voltage detection circuit 203, configured to detect the output voltage of the buck circuit 202, obtain a first voltage value, compare the first voltage value with a first set voltage threshold, and send a first comparison result to the buck circuit 202, and the buck circuit 202 controls the charging mode of the energy storage unit 201 based on the first comparison result; wherein, the charging mode includes: a constant current charging mode and a trickle charging mode.

[0073] It should be noted that since the selected energy storage unit 201 has a large capacity, the voltage of the energy storage unit 201 changes slowly during the charging process, and the first voltage detection circuit 203 cannot quickly provide a first comparison result feedback during the charging start process. Moreover, if the buck circuit 202 uses a constant voltage charging mode to charge the energy storage unit 201, it is easy to occur that the charging current of the energy storage unit 201 is too large to exceed the power supply capacity of the power supply circuit 300, resulting in the power supply circuit 300 triggering protection. Considering the foregoing situation, in the embodiment of the present application, the buck circuit 202 needs to control the charging current of the energy storage unit 201 to be constant and not exceed the power supply capacity range of the power supply circuit 300.

[0074] In an application example of the present application, the buck circuit 202 further includes a current sampling and feedback circuit, which is used to collect the output current value of the buck circuit 202 and feedback the current value to the buck circuit 202. The buck circuit 202 determines whether the charging current of the energy storage unit 201 is constant and does not exceed the power supply capacity range of the power supply circuit 300 based on the feedback current value.

[0075] It can be understood that the charging mode of the energy storage unit 201 includes a constant current charging mode and a trickle charging mode. In the constant current charging mode, the buck circuit 202 charges the energy storage unit 201 with a constant preset charging current. As the charging process progresses, the current power of the energy storage unit 201 gradually increases, and the charging voltage output by the buck circuit 202 also gradually increases; when the output voltage of the buck circuit 202 is equal to the target charging voltage of the energy storage unit 201 (i.e., the first set voltage threshold), the buck circuit 202 cannot maintain the constancy of the charging current by increasing the output voltage. At this time, the buck circuit 202 uses the trickle charging mode to charge the energy storage unit 201. In the trickle charging mode, the buck circuit 202 charges the energy storage unit 201 with a small current at a constant voltage to make up for the power loss of the energy storage unit 201 due to self-discharge.

[0076] Here, considering that the energy storage unit 201 needs to reserve sufficient voltage withstand derating, the first set voltage threshold should be less than the allowable charging voltage of the energy storage unit 201 at the current temperature.

[0077] Among them, the allowable charging voltage of the energy storage unit 201 can be a uniquely determined value. The average temperature of the surrounding environment where the air conditioner is located can be combined. For example, when the average temperature is 25 °C, the allowable charging voltage of the energy storage unit 201 is determined, and the first set voltage threshold should be less than the allowable charging voltage of the energy storage unit 201 at the average ambient temperature.

[0078] Among them, the voltage withstand derating level of the energy storage unit 201 can be determined according to the surrounding environment where the air conditioner is located. For example, when the air conditioner is applied to the ground environment, the voltage withstand derating level of the energy storage unit 201 can be secondary derating or tertiary derating.

[0079] It can be understood that the first voltage value obtained by the first voltage detection circuit 203 should be within the allowable operating voltage range of the controller 100.

[0080] It should be noted that the first voltage detection circuit 203 includes a first comparator, which is used to compare the first voltage value with the first set voltage threshold, generate a first comparison result and send it to the buck circuit 202. The buck circuit 202 controls the charging mode of the energy storage unit 201 based on the first comparison result.

[0081] Exemplarily, as Figure 4As shown in the figure, the control device further includes: a second voltage detection circuit 600, configured to detect the power supply state of the external power supply 500, generate first power detection information indicating that the external power supply 500 is supplying power normally, and send the first power detection information to the controller 100.

[0082] It can be understood that the controller 100 determines whether the external power supply 500 is supplying power normally according to the first power detection information sent by the second voltage detection circuit 600. The embodiments of the present application do not specifically limit the manner in which the second voltage detection circuit 600 detects the power supply state of the external power supply 500.

[0083] Exemplarily, the energy storage unit 201 is further configured to supply power to the controller 100 within a first set duration when the power supply circuit 300 is powered off; wherein, the first set duration is greater than or equal to the duration required for the controller 100 to control at least one valve body 400 from the fully open state to the fully closed state.

[0084] It can be understood that when the power supply circuit 300 is powered off, the buck circuit 201 cannot supply power to the controller 100, and the energy storage unit 201 stops charging. At this time, the electric energy stored in the energy storage unit 201 can supply power to the controller 100. To ensure that the controller 100 can control at least one valve body 400 to close to the fully closed state, the energy storage unit 201 supplies power to the controller 100 for at least the first set duration.

[0085] It can be understood that since the first set duration is greater than or equal to the duration required for the controller 100 to control the valve body 400 from the fully open state to the fully closed state, when the controller 100 executes the control action to close the valve body 400 for the first set duration, it can be determined that the valve body 400 is in the fully closed state at this time.

[0086] Exemplarily, the energy storage unit 201 is configured such that when the power supply circuit 300 is powered off, the output voltage value of the energy storage unit 201 is greater than or equal to a second set voltage threshold within a first set duration; wherein, the second set voltage threshold is the lower limit value of the allowable operating voltage of the controller 100.

[0087] It can be understood that the second set voltage threshold is the lower limit value of the allowable operating voltage of the controller 100. When the output voltage value of the energy storage unit 201 is greater than or equal to the second set voltage threshold, it can ensure the normal operation of the controller 100; when the output voltage value of the energy storage unit 201 is less than the second set voltage threshold, it cannot ensure the normal operation of the controller 100.

[0088] It should be noted that the capacity of the energy storage unit 201 needs to ensure that in the discharge mode, after discharging for the first set duration, the output voltage value of the energy storage unit 201 is greater than or equal to the second set voltage threshold, that is, the output voltage of the energy storage unit 201 can ensure that the controller 100 controls at least one valve body 400 to close to the fully closed state within the first set duration, and the energy storage unit 201 meets the derating level requirements.

[0089] Here, the lower limit value of the allowable operating voltage of the controller 100 can be obtained from the technical specification provided by the manufacturer of the controller 100.

[0090] Exemplarily, the energy storage circuit 200 and the controller 100 are arranged on the same substrate.

[0091] Exemplarily, the control device is arranged on the main control board of the outdoor unit of the air conditioner.

[0092] It can be understood that in the embodiment of the present application, the energy storage circuit 200 and the controller 100 are connected in series. The energy storage circuit 200 can be used as a voltage stabilizing circuit at the front end of the power supply terminal of the controller 100, and there is no need to set a voltage conversion circuit between the energy storage unit 201 and the controller 100. Based on the miniaturization design scheme of the energy storage circuit 200, the energy storage circuit 200 and the controller 100 can be arranged on the same substrate, saving the cost of the control device.

[0093] In an application example of the present application, a structural schematic diagram of a control device of an air conditioner is provided, as Figure 5 shown. Among them, the power supply circuit 300 includes a rectifier circuit 301, a filter circuit 302 and a switching power supply circuit 303. The controller 100 includes a control chip 101 and a valve body control circuit 102. The control chip 101 generates a valve body control instruction and sends it to the valve body control circuit 102. The valve body control circuit 102 generates n valve body control information based on the valve body control instruction to respectively control the opening degrees of n valve bodies to be in a set state.

[0094] Here, considering that the power supply voltages of the control chip 101 and the valve body control circuit 102 are different, the control device further includes a first controller power supply 701 and a second controller power supply 702, which are used to convert the output voltage of the energy storage circuit 200 into the power supply voltages of the control chip 101 and the valve body control circuit 102.

[0095] Here, at least one valve body 400 includes a first valve body 401 and a second valve body 402, that is, the valve body control circuit 102 generates two valve body control information to control the opening degrees of the first valve body 401 and the second valve body 402 to be in a set state.

[0096] The embodiment of the present application also provides a control method based on the foregoing control device, as Figure 6 shown. The method includes:

[0097] Step 601, determine that the power supply circuit is de-energized.

[0098] Step 602, control at least one valve body to close to the fully closed state.

[0099] It can be understood that for the control method of the embodiment of the present application, on the premise that the controller 100 does not receive an external shutdown instruction, by determining that the power supply circuit 300 is de-energized, it is judged that the output voltage of the buck circuit 201 will no longer be able to ensure the normal operation of the controller 100. The controller 100 executes the shutdown steps, controls the valve body 400 to close to the fully closed state, effectively avoiding the situation that the controller 100 cannot control the opening degree of the valve body 400 due to a sudden power failure of the external power supply 500, and further eliminating the leakage of combustible refrigerant to the surrounding environment where the air conditioner is located through the leak point when there is a leak in the indoor unit of the air conditioner, improving the safety and reliability of the air conditioner.

[0100] It can be understood that after the power supply circuit 300 is de-energized, the energy storage unit 201 no longer charges. Since the controller 100 continues to operate, at this time, the energy storage unit 201 switches from the charging mode to the discharging mode, and the energy storage unit 201 supplies power to the controller 100.

[0101] It should be noted that the energy storage unit 201 can be an electrolytic capacitor. When the output voltage value of the buck circuit 202 is less than the voltage value of the energy storage unit 201, the energy storage unit 201 directly supplies power to the controller 100 without control.

[0102] In an application example of the present application, after step 601, the control method further includes: stopping the compressor and the outdoor DC fan.

[0103] Here, in addition to controlling the opening degree of the valve body 400, the controller 100 of the control device can also control the start and stop of the compressor and the outdoor DC fan of the air conditioner.

[0104] Exemplarily, after step 602, the control method further includes: after controlling at least one valve body 400 to close for a first set duration, the controller 100 shuts down and cuts off the power; wherein, the first set duration is greater than or equal to the duration required for the controller 100 to control at least one valve body 400 to change from the fully open state to the fully closed state.

[0105] It can be understood that when the controller 100 determines that the power supply circuit 300 is powered off, the controller 100 controls the valve body 400 to close to the fully closed state. Since the controller 100 cannot directly detect the current opening of the valve body 400, the controller 100 controls the valve body 400 to close for a first set duration, where the first set duration is greater than or equal to the duration required for the controller 100 to control the valve body 400 to move from the fully open state to the fully closed state, so as to indirectly determine that the valve body 400 is currently in the fully closed state. At this time, the controller 100 has completed all the set shutdown steps, and the air conditioner does not need to be powered on to work, and the controller 100 executes the power-off step.

[0106] It can be understood that after controlling the valve body 400 to close to the fully closed state, the controller 100 is powered off, and the energy storage unit 201 no longer supplies power to the controller 100.

[0107] Exemplarily, determining that the power supply circuit 300 is powered off includes:

[0108] If the first power detection information is not received within the second set duration, it is determined that the power supply circuit 300 is powered off.

[0109] Wherein, the first power detection information is generated by the second voltage detection circuit 600 of the control device and is used to indicate that the external power supply 500 is supplying power normally.

[0110] Here, in an application example of the present application, the second voltage detection circuit 600 can be an optocoupler voltage detection circuit. As Figure 7 shown, the external power supply 500 is connected to the optocoupler IC71 through the diode D71 and the high-power resistor R71. The high-power resistor R72, the capacitor C71 and the Schottky diode D72 play a voltage stabilization and protection role. And the optocoupler IC71 conducts during the positive half cycle of the output voltage of the external power supply 500 and is cut off during the negative half cycle of the output voltage of the external power supply 500; the control power supply is grounded through the capacitor C72. The output end of the optocoupler is connected to the pull-up resistor R73 and the high-power resistor R74. When the optocoupler IC71 conducts, the controller 100 receives a low-level signal, and when the optocoupler IC71 is cut off, the controller 100 receives a high-level signal.

[0111] Figure 8 This is a waveform schematic diagram of the first power detection information in an application example of the present application.

[0112] It can be understood that the first power supply detection information may be a low-level signal generated by the second voltage detection circuit 600. When the external power supply 500 supplies power normally, the controller 100 will periodically receive the low-level signal according to the frequency of the output voltage of the external power supply 500. If the controller 100 does not receive the low-level signal sent by the second voltage detection circuit 600 within the second set duration, it is determined that the external power supply 500 supplies power abnormally, and then it is determined that the power supply circuit 300 powered by the external power supply 500 is powered off.

[0113] It can be understood that the second set duration is greater than or equal to one cycle of the output voltage of the external power supply 500. When the external power supply 500 supplies power normally, within half of the second set duration, the controller 100 receives the low-level signal sent by the second voltage detection circuit 600, and within the other half of the second set duration, the controller 100 receives the high-level signal sent by the second voltage detection circuit 600.

[0114] Exemplarily, the method further includes: receiving the first power supply detection information within the second set duration, determining that the external power supply 500 supplies power normally; controlling at least one valve body 400 to reset and be in a set state.

[0115] It can be understood that when the external power supply 500 supplies power normally, the second voltage detection circuit 600 sends a high-level signal within the second set duration, and the controller 100 determines that the external power supply 500 supplies power normally based on the high-level signal, performs a reset operation on at least one valve body 400, and after completing the reset operation, controls the opening degree of at least one valve body 400 to be in a set state and waits for the next valve body control instruction.

[0116] In an application example of the present application, a schematic structural diagram of an air conditioner is provided, as Figure 9 shown. The outdoor unit of the air conditioner includes components such as an outdoor heat exchanger, a gas-liquid separator, a compressor, a check valve, and a four-way valve. A refrigerant pipeline is provided between the indoor unit and the outdoor unit of the air conditioner. An electric valve group 403 is provided on the branch of the refrigerant pipeline. The electric valve group 403 includes electric valves provided on each branch of the refrigerant pipeline. The electric valve group 403 is used to control the refrigerant flow rate in the branch of the refrigerant pipeline. A first electric valve 404 and a second electric valve 405 are respectively provided on the inlet side and the outlet side of the main loop of the refrigerant pipeline. The first electric valve 404 and the second electric valve 405 are used to cut off the refrigerant flow in the refrigerant pipeline. It can be understood that based on Figure 11 the schematic structural diagram of the air conditioner shown, after the controller 100 determines that the external power supply 500 supplies power normally, a reset operation is performed on the electric valves on the refrigerant pipeline of the air conditioner.

[0117] Here, the reset operation of the electric valve on the refrigerant pipeline of the air conditioner may include: the controller 100 controls the electric valves in the electric valve group 403 to be reset in sequence and maintain the set opening degree, and after determining that the electric valve group 403 has completed the reset operation, controls the first electric valve 404 and the second electric valve 405 to be reset and maintain the set opening degree.

[0118] Here, the reset operation of the electric valve on the refrigerant pipeline of the air conditioner may also include: the controller 100 controls the first electric valve 404 and the second electric valve 405 to be reset and maintain the set opening degree, and after determining that the first electric valve 404 and the second electric valve 405 have completed the reset operation, controls the electric valves in the electric valve group 403 to be reset in sequence and maintain the set opening degree.

[0119] Preferably, the first electric valve 404 and the second electric valve 405 being reset and maintaining the set opening degree may mean that the first electric valve 404 and the second electric valve 405 are closed to the fully closed state after being reset. At this time, the refrigerant pipeline of the air conditioner is in a cut-off state, avoiding refrigerant leakage. In an application example of the present application, a control method for the normal power-on operation of the control device is provided, as Figure 10 shown, including:

[0120] Step 1001, the air conditioner is powered on.

[0121] Here, the air conditioner being powered on means that the external power supply 500 supplies power normally, and the output voltage can ensure the startup and operation of the air conditioner.

[0122] Step 1002, the power supply circuit works normally.

[0123] Here, the power supply circuit 300 successfully receives power from the external power supply 500, and the power supply circuit 300 supplies power to the energy storage circuit 200.

[0124] Step 1003, the energy storage circuit works normally.

[0125] Here, the energy storage circuit 200 successfully receives power from the power supply circuit 300, and the energy storage circuit 200 supplies power to the controller 100.

[0126] Step 1004, the controller works normally.

[0127] Here, the controller 100 successfully receives power from the energy storage circuit 200, and the controller 100 controls the opening degree of at least one valve body 400.

[0128] Step 905, the air conditioner works normally.

[0129] Here, the normal operation of the air conditioner includes the normal operation of the control device, and also includes the normal operation of air conditioner components such as the valve body 400, the compressor, and the outdoor DC fan.

[0130] Among them, in step 1003, the energy storage circuit works normally, specifically including:

[0131] Step 10031, the buck circuit charges the energy storage unit in a constant current charging mode.

[0132] Here, since the air conditioner is in the power-on startup stage and the remaining power of the energy storage unit 201 is low at this time, the buck circuit 202 charges the energy storage unit 201 in a constant current charging mode.

[0133] Step 10032, determine whether the first voltage value is equal to the first set voltage threshold. If so, execute step 10033; if not, continue to execute step 10031.

[0134] Step 10033, the buck circuit charges the energy storage unit in a trickle charging mode.

[0135] In an application example of the present application, a control method of a control device when an external power supply suddenly loses power is provided. As Figure 11 shown, including:

[0136] Step 1101, the external power supply loses power.

[0137] Here, the power failure of the external power supply 500 can be a sudden power outage of the external power supply 500, or the power plug of the air conditioner can suddenly fall off from the socket.

[0138] Step 1102, determine that the power supply circuit is powered off.

[0139] Here, it can be determined that the power supply circuit 300 is powered off according to the fact that the first power detection information is not received within the second set duration. Among them, the first power detection information can be a low-level signal periodically sent by the second voltage detection circuit 600, and the second set duration is greater than or equal to one cycle of the output voltage of the external power supply 500. The controller 100 determines that the power supply of the external power supply 500 is abnormal, and further determines that the power supply circuit 300 powered by the external power supply 500 is powered off.

[0140] Step 1103, the energy storage unit supplies power to the controller.

[0141] Here, since the power supply circuit 300 is powered off, the output voltage of the buck circuit 202 will soon be unable to ensure the normal operation of the controller 100. The energy storage unit 201 stops charging. When the output voltage value of the buck circuit 202 is lower than the voltage value of the energy storage unit 201, the energy storage unit 201 discharges and directly supplies power to the controller 100.

[0142] Step 1104, stop the compressor and the outdoor unit DC fan.

[0143] Here, in addition to controlling the opening degree of the valve body 400, the controller 100 of the control device can also control the start and stop of the compressor and the outdoor DC fan of the air conditioner.

[0144] Step 1105, close the control valve body to the fully closed state.

[0145] Step 1106, the controller shuts down and cuts off the power.

[0146] Here, after the controller 100 determines that the valve body 400 is all in the fully closed state, and determines that all the shutdown steps have been completed, the controller 100 shuts down and cuts off the power.

[0147] Here, it is possible to start timing from the start of the closing action of the valve body 400 controlled by the controller 100. After reaching the first set duration, the controller 100 determines that the valve body 400 is all in the fully closed state, where the first set duration is greater than or equal to the duration required for the controller 100 to control at least one valve body 400 from the fully open state to the fully closed state.

[0148] It can be understood that any step of the control method of the control device in the foregoing embodiments of the present application can be implemented by the configuration program of the controller 100 of the control device.

[0149] The embodiments of the present application also provide an electronic device, which is an air conditioner. The electronic device includes at least one valve body 400 and the control device described above in the embodiments of the present application. In this way, without receiving an external shutdown instruction, the electronic device can determine that the power supply circuit 300 is powered off, judge that the output voltage of the step-down circuit 201 will soon be unable to ensure the normal operation of the controller 100, and the controller 100 executes the shutdown steps to control the valve body 400 to close to the fully closed state, effectively avoiding the situation that the controller 100 cannot control the opening degree of the valve body 400 due to a sudden power failure of the external power supply 500. Furthermore, when there is a leak point in the indoor unit of the air conditioner, it can prevent the combustible refrigerant from leaking to the surrounding environment of the air conditioner through the leak point via the valve body, improving the safety and reliability of the air conditioner.

[0150] In an exemplary embodiment, the embodiment of the present application further provides a storage medium, namely a computer storage medium, specifically a computer-readable storage medium. For example, it includes a memory storing a computer program, and the aforementioned computer program can be executed by the microprocessor of the control device to complete the steps described in the method of the embodiment of the present application. The computer-readable storage medium can be a read-only memory (ROM, Read Only Memory), a programmable read-only memory (PROM, Programmable Read-Only Memory), an erasable programmable read-only memory (EPROM, Erasable Programmable Read-Only Memory), an electrically erasable programmable read-only memory (EEPROM, Electrically Erasable Programmable Read-Only Memory), a ferromagnetic random access memory (FRAM, ferromagnetic random access memory), a flash memory (Flash Memory), a magnetic surface memory, an optical disc, or a compact disc read-only memory (CD-ROM, Compact Disc Read-Only Memory); the magnetic surface memory can be a disk memory or a tape memory.

[0151] It should be noted that: "first", "second", etc. are used to distinguish similar objects and do not necessarily have to be used to describe a specific order or sequence.

[0152] In addition, the technical solutions described in the embodiments of the present application can be arbitrarily combined without conflict.

[0153] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A control device for an air conditioner, characterized in that, at least one valve body is provided on the refrigerant pipeline of the air conditioner, and the control device includes: a controller for controlling the operation of the at least one valve body and supplying power to the at least one valve body; an energy storage circuit for supplying power to the controller; the output end of the energy storage circuit is connected to the power supply end of the controller; a power supply circuit for converting and processing an external power supply and supplying power to the energy storage circuit; the output end of the power supply circuit is connected to the power supply end of the energy storage circuit; wherein, when the power supply circuit supplies power to the energy storage circuit, the energy storage circuit is used to store the electric energy output by the power supply circuit and perform filtering and voltage stabilization processing on the output power supply of the power supply circuit.

2. The control device according to claim 1, characterized in that, the energy storage circuit includes: an energy storage unit for storing the electric energy output by the power supply circuit and supplying power to the controller when the power supply circuit is powered off; a buck circuit for stepping down the output voltage of the power supply circuit and charging the energy storage unit and supplying power to the controller.

3. The control device according to claim 2, characterized in that, the energy storage circuit further includes: a first voltage detection circuit for detecting the output voltage of the buck circuit, obtaining a first voltage value, comparing the first voltage value with a first set voltage threshold, and sending a first comparison result to the buck circuit, and the buck circuit controls the charging mode of the energy storage unit based on the first comparison result; wherein, the charging mode includes: a constant current charging mode and a trickle charging mode.

4. The control device according to claim 1, characterized in that, the control device further includes: a second voltage detection circuit for detecting the power supply state of the external power supply, generating first power detection information indicating that the external power supply is powered normally, and sending the first power detection information to the controller.

5. The control device according to claim 2, characterized in that, the energy storage unit is further configured to supply power to the controller within a first set duration when the power supply circuit is powered off; wherein, the first set duration is greater than or equal to the duration required for the controller to control the at least one valve body to change from a fully open state to a fully closed state.

6. The control device according to claim 5, characterized in that, the energy storage unit is configured to: when the power supply circuit is powered off, the output voltage value of the energy storage unit is greater than or equal to a second set voltage threshold within the first set duration; wherein, the second set voltage threshold is the lower limit value of the allowable operating voltage of the controller.

7. The control device according to claim 1, characterized in that, the energy storage circuit and the controller are arranged on the same substrate.

8. The control device according to claim 1, characterized in that, the control device is arranged on the main control board of the outdoor unit of the air conditioner.

9. The control device according to claim 2, characterized in that, the energy storage unit includes: an electrolytic capacitor.

10. A control method for the control device of an air conditioner according to any one of claims 1 to 9, Characterized in that, including: Determine that the power supply circuit is powered off; Control the at least one valve body to close to a fully closed state.

11. The method according to claim 10, Characterized in that, further including: After controlling the at least one valve body to close for a first set duration, the controller shuts down and cuts off the power supply; wherein, the first set duration is greater than or equal to the duration required for the controller to control the at least one valve body to move from a fully open state to a fully closed state.

12. The method according to claim 10, Characterized in that, The determination that the power supply circuit is powered off includes: If the first power detection information is not received within a second set duration, determine that the power supply circuit is powered off; wherein, the first power detection information is generated by the second voltage detection circuit of the control device and is used to indicate that the external power supply is supplying power normally.

13. The method according to claim 10, Characterized in that, further including: If the first power detection information is received within a second set duration, determine that the external power supply is supplying power normally; Control the at least one valve body to reset and be in a set state; wherein, the first power detection information is generated by the second voltage detection circuit of the control device and is used to indicate that the external power supply is supplying power normally.

14. A control device of an air conditioner according to any one of claims 1 to 9, Characterized in that, The controller is configured to execute the steps of the method according to any one of claims 10 to 13.

15. An electronic device, Characterized in that, The electronic device is an air conditioner, including: at least one valve body and the control device according to claim 14.

16. A storage medium, on which a computer program is stored, Characterized in that, When the computer program is executed by a processor, the steps of the method according to any one of claims 10 to 13 are implemented.

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